Perhaps you should try some spelling variations:
"maps communication issues" » "maps community issues", "maps communication india", "maps communication united", "mass communication issues", "mass communications issues", "lea's communication issues"
"city cooperation implies" » "city cooperation series", "city cooperation studies", "city cooperation civility", "city corporation implies", "china cooperation implies", "city corporations implies"
"pro colonization still" » "pro colonization failed", "pro colonization israel", "pro colonization songs", "bio colonization still", "re colonization still", "mars colonization still"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("maps communication issues") or ((("pro colonization still") or ("city cooperation implies"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("maps communication issues") OR ((("pro colonization still") OR ("city cooperation implies")))).
• Removing quotes may allow a broader search: (( maps communication issues ) or ((( pro colonization still ) or ( city cooperation implies )))).
• Adding a wildcard symbol may retrieve word variants: (("maps communication issues") or ((("pro colonization still") or ("city cooperation implies"))))*.